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Temperature and initial curvature effects in low-density panel flutterThe panel flutter phenomenon is studied assuming free-molecule flow. This kind of analysis is relevant in the case of hypersonic flight vehicles traveling at high altitudes, especially in the leeward portion of the vehicle. In these conditions the aerodynamic shear can be expected to be considerably larger than the pressure at a given point, so that the effects of such a loading are incorporated into the structural model. Both the pressure and shear loadings are functions of the panel temperature, which can lead to great variations on the location of the stability boundaries for parametric studies. Different locations can, however, be 'collapsed' onto one another by using as ordinate an appropriately normalized dynamic pressure parameter. This procedure works better for higher values of the panel temperature for a fixed undisturbed flow temperature. Finally, the behavior of the system is studied when the panel has some initial curvature. This leads to the conclusion that it may be unrealistic to try to distinguish between a parabolic or sinusoidal initial shape.
Document ID
19920053071
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Resende, Hugo B.
(Stanford University CA, United States)
Date Acquired
August 15, 2013
Publication Date
January 1, 1992
Subject Category
Structural Mechanics
Report/Patent Number
AIAA PAPER 92-2128
Meeting Information
Meeting: AIAA Dynamics Specialists Conference
Location: Dallas, TX
Country: United States
Start Date: April 16, 1992
End Date: April 17, 1992
Accession Number
92A35695
Funding Number(s)
CONTRACT_GRANT: NGL-05-020-243
Distribution Limits
Public
Copyright
Other

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